Question 1

Write the formula for diamminedichloroethylenediaminecobalt(III)  bromide.

Accepted Answer

A)   [CoCl2(en) (NH3) 2]Br
B)   [CoCl2(en) (NH3)  2]Br2
C)   [CoCl2(en) 2(NH3) 2]Br
D)   [CoCl2(en) 2(NH3) 2]Br2
E)   (NH3) 2Cl2(en) Co3BrF) A) and B)
G) B) and D)

Question 2

How many 3d electrons does a ground-state Sc3+ ion have?

Accepted Answer

A)   1
B)   3
C)   2
D)   10
E)   0F) A) and D)
G) A) and E)

Question 3

An equimolar mixture (50:50 ratio) of two enantiomers is called a(n) ________ ________.

Accepted Answer

The answer of An equimolar mixture (50:50 ratio) of two...

Question 4

How many geometric isomers can the following square-planar complex have?

Accepted Answer

A)   1
B)   2
C)   3
D)   4
E)   6F) A) and D)
G) B) and E)

Question 5

What is the name of the atom in a ligand that is bound directly to the metal atom?

Accepted Answer

A)   Acceptor atom
B)   Donor atom
C)   Chelating atom
D)   Coordinator
E)   Chelating agentF) B) and C)
G) B) and D)

Question 6

The maximum oxidation state of an element in the first transition series never exceeds its group number.

Accepted Answer

A) True 
 B)False

Question 7

Octahedral complexes can exhibit geometric and optical isomerism.

Accepted Answer

A) True 
 B)False

Question 8

The crystal field splitting energy, Δ,

Accepted Answer

A)   is larger for tetrahedral complexes than for octahedral complexes.
B)   depends on the metal but not on the ligand.
C)   determines the color of a complex.
D)   is larger for ionic ligands like chloride than for molecular ligands like carbon monoxide, CO.
E)   determines the charge of a complex.F) C) and E)
G) B) and D)

Question 9

How many 3d electrons does a ground-state Fe3+ ion have?

Accepted Answer

A)   3
B)   5
C)   6
D)   7
E)   9F) C) and D)
G) C) and E)

Question 10

If the plane of polarization is rotated to the right then the isomer is ________.

Accepted Answer

The answer of If the plane of polarization is rotated...

Question 11

What is the label used for an isomer which is levorotatory?

Accepted Answer

The answer of What is the label used for an...

Question 12

Iron(III)  forms an octahedral complex with the ligand CN-. How many unpaired electrons are in the d orbitals of iron?

Accepted Answer

A)   1
B)   3
C)   5
D)   7
E)   9F) All of the above
G) C) and D)

Question 13

Which of the following will be paramagnetic?

Accepted Answer

A)   V5+
B)   Ni2+
C)   Mn7+
D)   Ti4+
E)   Zn2+F) C) and D)
G) A) and B)

Question 14

The ion [Co(NH3) 6]2+ is octahedral and high spin. This complex is

Accepted Answer

A)   paramagnetic, with 1 unpaired electron.
B)   paramagnetic, with 3 unpaired electrons.
C)   paramagnetic, with 4 unpaired electrons.
D)   paramagnetic, with 5 unpaired electrons.
E)   diamagnetic.F) A) and E)
G) A) and B)

Question 15

Which of the following ligands has two different types of donor atoms?

Accepted Answer

A)   NH3
B)   H2O
C)   NH4+
D)   NO2-
E)   ethylenediamineF) B) and D)
G) C) and D)

Question 16

In the coordination compound [Co(en) 2Cl2]Cl, the coordination number and oxidation number of the central atom are ________ and ________, respectively.

Accepted Answer

A)   4; +3
B)   6; +2
C)   4; +2
D)   6; +3
E)   4; +1F) B) and E)
G) D) and E)

Question 17

In K4[Fe(CN) 6], how many 3d electrons does the iron atom have?

Accepted Answer

A)   3
B)   4
C)   5
D)   6
E)   7F) C) and D)
G) B) and E)

Question 18

The following energy-level diagram could correspond to which coordination compound?

Accepted Answer

A)   hexabromomanganate(II) 
B)   hexacyanoferrate(II) 
C)   hexacyanoferrate(III) 
D)   hexabromomanganate(IV) 
E)   hexachlorochromate(II) F) D) and E)
G) C) and D)

Question 19

Which of these diagrams represent the crystal field splitting between d orbitals in a tetrahedral complex?

Accepted Answer

A)   
B)   
C)   
D)   E) A) and B)
F) A) and C)

Question 20

In the coordination compound [Pt(NH3) 2Cl2], the coordination number and oxidation number of the central atom are ________ and ________, respectively.

Accepted Answer

A)   2; 0
B)   4; +4
C)   5; 0
D)   4; +2
E)   6; +2F) A) and E)
G) C) and E)

Exam 22: Coordination Chemistry

How many geometric isomers can the following square-planar complex have?

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Iron(III) forms an octahedral complex with the ligand CN-. How many unpaired electrons are in the d orbitals of iron?

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An equimolar mixture (50:50 ratio) of two enantiomers is called a(n) ________ ________.

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What is the label used for an isomer which is levorotatory?

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The following energy-level diagram could correspond to which coordination compound?

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What is the name of the atom in a ligand that is bound directly to the metal atom?

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Octahedral complexes can exhibit geometric and optical isomerism.

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Which of these diagrams represent the crystal field splitting between d orbitals in a tetrahedral complex?

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The maximum oxidation state of an element in the first transition series never exceeds its group number.

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In K4[Fe(CN) 6], how many 3d electrons does the iron atom have?

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Which of the following ligands has two different types of donor atoms?

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The crystal field splitting energy, Δ,

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If the plane of polarization is rotated to the right then the isomer is ________.

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Which of the following will be paramagnetic?

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Write the formula for diamminedichloroethylenediaminecobalt(III) bromide.

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The ion [Co(NH3) 6]2+ is octahedral and high spin. This complex is

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How many 3d electrons does a ground-state Fe3+ ion have?

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How many 3d electrons does a ground-state Sc3+ ion have?

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In the coordination compound [Pt(NH3) 2Cl2], the coordination number and oxidation number of the central atom are ________ and ________, respectively.

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In the coordination compound [Co(en) 2Cl2]Cl, the coordination number and oxidation number of the central atom are ________ and ________, respectively.

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Iron(III) forms an octahedral complex with the ligand CN^-. How many unpaired electrons are in the d orbitals of iron?

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An equimolar mixture (50:50 ratio) of two enantiomers is called a(n) .

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In K₄[Fe(CN) ₆], how many 3d electrons does the iron atom have?

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The ion [Co(NH₃) ₆]²⁺ is octahedral and high spin. This complex is

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How many 3d electrons does a ground-state Fe³⁺ ion have?

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How many 3d electrons does a ground-state Sc³⁺ ion have?

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In the coordination compound [Pt(NH₃) ₂Cl₂], the coordination number and oxidation number of the central atom are and , respectively.

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In the coordination compound [Co(en) ₂Cl₂]Cl, the coordination number and oxidation number of the central atom are and , respectively.

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